[sdiy] Newbie alert: opamp resistor values

[David G. Dixon]

Here's another question from a relative newbie:

What are the basic guidelines for selecting absolute resistor values for
opamp circuits?  For example, say one needs a unity-gain inverter or summer,
and is using a generic FET-input opamp (TL07x, say).  What determines
whether one uses 10k, 100k, or 1M for the two resistors, or something
inbetween?  Now, what if input impedance is not an issue (i.e., the incoming
voltage is well buffered)?

David G. Dixon
Professor
Department of Materials Engineering
University of British Columbia
309-6350 Stores Road
Vancouver, B.C.  V6T 1Z4
Canada
 
Tel 1-604-822-3679
Fax 1-604-822-3619
 
"PERFECTA FINGAMUS SERVIAT NATURA"

The information in this email and in any attachments is confidential and
intended solely for the attention and use of the named addressee(s).  It
must not be disclosed to any person without the writer's authority.  If you
are not the intended recipient, or a person responsible for delivering it to
the intended recipient, you are not authorized to and must not disclose,
copy, distribute, or retain this message or any part of it.